str1 = '111'
print(str1)
str2 = '222'
print(str2)
str3 = '''333
444
555
'''
print(str3)
print('{0}---{1}---{2}'.format(1,2,3))
str4 = '6666'
print(f'{str4}')

for i in range(0, 101, 2):
    print("=======开始下载======")
    if i == 100:
        print("下载完成")
        break
    else:
        print(f'{i}% [{("*" * (i // 2))} {("." * (50 - i // 2))}]')
str5 = 'good dood study'
